What are some things to write a song about?

People write songs about things in life that are important to others who can relate.

Possible subjects to write a song about include:

Falling in love

Losing a loved one

Breaking up

Vehicles - trucks, cars, tractors

At least one song was written about a yard sale.

Go with your feelings and start writing. Just write whatever you think of, and edit your rough draft to form whatever point you want to make with your song.